Hydroxyl-terminated polymers

Details Hydroxyl-terminated polymers Hydroxyl-terminated polymers

1984-04-18

1985-12-31

Henderson, Christopher A.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

428463, 524507, 524509, 524512, 526320, 5263297, C08F 2018

Patent

active

045622353

ABSTRACT:
There is disclosed linear polymers and copolymers of polymerized monoethylenically unsaturated monomers having a weight average molecular weight from about 1,500 to about 15,000, with most of the polymer ends being terminated with hydroxyl groups, one at each end of the polymer molecule. These polymers have an average of from about 1.6 to 5 hydroxyl groups per polymer molecule. Thermosetting coating compositions containing these polymers are also disclosed. The monomers which are polymerized may include a small proportion of hydroxy-functional monomers, but desirably consist of monoethylenically unsaturated monomers lacking hydroxyl functionality. The polymers are produced by polymerizing the monoethylenically unsaturated monomers in organic solvent solution medium containing a free radical initiator and a proportion of a chain-terminating agent which is a bis hydroxyorganic xanthogen disulfide in which the organic group is preferably an alkylene group contains from 2-18 carbon atoms to provide the desired molecular weight. The polymers are preferably liquid to slowly flowable at room temperature in the absence of organic solvent.

REFERENCES:
patent: 3047544 (1962-07-01), Byrd
patent: 3838140 (1974-09-01), Mayer-Mader
patent: 4156764 (1979-05-01), White

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